Grommet-making machine



May 21, 1929. w. A. YOUNG ET AL 1,714,339

GROMMET MAKING MACHINE ATTORNEY May 2l, 1929. w. A'. YOUNG ET AL 1,714,339

GROMMET'MAKING MACHINE Filed July 25, 1928 3 SheAetS-Sheet 2 Mmmm# l,// INVENToRs WITNESSES V f TVilLLamA.Yz/ng pr-f Roland L. Anfener 5 'I Z BY m, r6 A ATTORNEYy s sheets-sheet w. A. YOUNG ET A1.

GRoMMET MAKING MACHINE Filed'July 25,' 1928 "May 21, 1929.

Patented May 2l, 1929.

UNITED STATES PATENT OFFICE.

WILLIAM A. YOUNG AND ROLAND L. ANKENER, or NEW YORK, N.V Y.l

v efnoiiiiuir MAKING MACHINE.

Application filed YJuly 25,

l machine wherein a twisted strand of rope is twisted or entwined while applied to a mandrel and acted on in such a manner that av grommet will be formed thicker than the strands used.`

An. additional object is to provide a grommet formii'ig machine wherein the gromniet is twisted into the desiredsliape from astrand of rope and discharged with one end loose but in position tobe forced between. certain twists manually to a tied position.

In the accompanying drawings,- n Figure 1 is a front view lof a machine disclosing an embodiment of the invention Figure 2is an enlarged fragmentary View partly in section showing vthe winding structure; n v p Figure 3 is a top plan view of .the principal part of the machine shown in Fi.gure.1;,`

Figure 4 is a longitudinal vertical sectional view through the machine shown in Figure 1 with the winding apparatus omitted; l

Figure 5 is a sectionall View through Figure 4 approximately on the line 5 5;

Figure 6 is a fragmentary view showing the position of the rollers as the mandrel begins its outward movement;

Figure 7 is a fragmentary perspective view of part of the mandrel shown in Figure 4 with a strand'of rope looped thereover.

Figure 8 is a fragmentary view partly in section showing the position of the parts at the beginning of the formation of the groniinet; i Y Figure 9 is a view similar to Figure 8 but showing the parts and the groinmet at the end of the forming operation;

Figure 10 is a side View on an enlarged scale of a finished grommet. Y Referring to the accompanying drawings by numerals, 1 indicates a support of any kind adapted to carry the various mechanism here- 1928. Sera1No.'295,321.

inafter fully described. Arranged below the support 1 is a floor or second support 2 carry ing brackets 3 and 4 in which the rod 5.1is journaled. Treadles Gand 7 are mounted to rock on the rod or shaft 5 and to actuate .cer-v tain mechanism hereinafter fully described.

ln making the grommet 8, as shown in Figure and the free end ofthe rope 1G is passed Y through the loop or eye 11. The free end of the ropeor cable 10 is retained in the hand and the cable is wound around the mandrel 12,

as shown in Figure 8. As theomandrel and certain other parts function the rope or cable is drawn vin and twisted, as shown in Figure 9. rllhis completes thegrommet except that the free end must be forced through certain turns 8 of thek grommet 8, as shown in Figure 10.

Y As soon as the free end has been inserted, as

shown in Figure 10, the unnecessary part may be cut oit and the grommet is complete. In order to cause the knob 9 to rotate the' saineis rigidly secured to a shaft 13 which is 4on the ldisk 20 for forcing the pulleys 18 .against thefrictionsurface 17. When this has been Vdone power will be transmitted to the clutch 16 and thence to the shaft 13. A lever 23 is pivotally niountedat 24 on a sup-v port 25, said lever having an extension 26 positioned to bear against the centraly part of disk 20. A spring 27 is connected to lever` 23 Aandato the supporting standard 15', said spring being more powerful than spring 21 so as to hold thek disk 20 laway from hubA 19. Acable' 28 is connectedv to lever 23 and extends over thepulley 29 andthence downwardly to the treadle 6. Whenever tieadle 6-is moved ico downwardly cable 28 is pulled and this swings the lever 23 against the action of spring 2T, thus permitting spring 2l to function. Immediately upon the release of the disk 2O shaft 13 will beoin to rotate at a comparatively high rate of speed and will quickly twist the strands forming the rope lO. As soon as the proper twist has been secured the operator releases treadle 6 and spring 27 quickly overcomes the action of spring 2l and the power is thus quickly removed from shaft 23. The belt 30 extends over the pulley 18 and over a pulley 3l rigidly secured to the power shaft 32, whereby whenever this power shaft is op'- erated, power may be transmitted to shaft i3, as desired. At' the same time that the lever 23 is swung by reason of the operation of treadle 6 rod 33 will be pulled by trcadle 6 (Figure .1) and the lever 34 will be swung, whereupon the sliding bar 35 will move upwardly. This sliding` bar is guided by a suitable guidino1 structure 36 and carries an L- shaped bracket 3'? at its upper end. This bracket in turn carries standard 38 positioned to support the aille or shaft 39 on which the roller 40 is mounted. This roller is grooved, as shown in Figure l, said groove being alf most a half-circle and accommodating the mandrel l2 when the roller is elevated. The upward movement of the roller 4.0 is sufficient to raise the mandrel l2 to a position in contact with the roller 41 and as this roller is ro'- tating in the direction indicated by the arrow, mandrel 12 will be moved outwardly until the abutment 43 strikes the plate 44, but as the mandrel moves outwardly it will rotate for about a onequarter revolution by reason ofthe fact that the shaft 45 is square and is twisted sufficiently to give a one-quarter revolution to the mandrel. The member 46 is provided with a proper opening for receiving the shaft 45. lt will thus be seen that the inandrel is forced outwardly at the time that the twist of rope l0 is made. As heretofore set forth, the rope l0 is looped over the mandrel l2 when in its outer position and the free end is held by the hand of the operator as the mandrel is moved inwardly on its return movement. As soon as the treadle 6 has been released, roller 40 and associated parts will immediately move downwardly andthe parts will quickly assume the position shown in Fig ures 4 and 8. The mandrel l2 is tapering` for its full length and consequently as the rope l0 is rolled `and twisted upon itself until it assumes the position shown in Figure 9, the reduction of the bore of the grommet will be taken care of by the reduction in size of the iandrel as it moves backwardly. The power v shaft 82 carries pulleys 47 and 48, pulley 47 accommodating belt 49, which belt lits over the pulley 50. The pulley 48 is of ample width to accommodate the belts 51 and 52, belt 5l passing over pulley 53, while belt 52 passes over pulley 54. Pulley is rigidly secured to a stub shaft 55 which in turn is rigidly secured to the roller 41, while pulley 54 is rigidly secured to a stub shaft 56 rigidly secured to a lower roller 57. The belts are so arranged that the rollers 4l and 57 are rotating in opposite directions, thereby causing the same to be twisted or rotated in situ. The pulley 53 is rigidly secured to a shaft 58, which sha-ft in turn is rigidly secured to the roller 59, whereby roller 59 isdriven and acts to retract the mandrel l2 whenever the parts are in the position shown irpldigure 4. il. coactin roller 60 is arranged directly below roller 59 and issup ported in the desired position in the t nework 6l by an adjustable screw 62. The sh 63 carries at its end suitable blocks 64 adapted to support the springs 65, which in turn support the bearing blocks 66 of shaft 58.V 'llie shaft 58 extends beyond the bearing blocks 66 and has the eyes 68 of chains 69 fitted thereover, so that when these rods are pulled downwardly shaft 58 and associated parts are pulled downwardly. Chains 69, as shown in Figure l, are connected to a cross bar 70 which in turn is connected to a pull rod 7l, and pull rod 7l at its lower end is pivotally connected with treadle 7. lt will thus be seen that when treadle 7 is forced downwardly by the foot ofthe operator shaft 58 will be pulled downwardly and'roller 59 will be pressed against the mandrel l2, and as this roller is rotating the mandrel will be gradually retracted or moved towardy thev supporting bracket or standard 72. As soon `the rope 10 has been placed in the position shown in Figure 7 treadle 7 is depressed and the rope quickly wound around the mandrel, as shown in F igure 8. The treadle 7 is maintained depressed, so that the mandrel will be gradually withdrawn and as it is gradually withdrawn the rollers 4l and 57 will rotate the grommet and gradually twistthefree part of the rope l() around the looped part, so that by the time the mandrel reaches the position shown in Figure 9, the grommet will be completely formed, except that the free end or extension 8 will be hanging loose. At a later time this is forced beneath one of the twists S and then the extra portion cut off. lVhen other strands of rope are looped over the knob 9, as here-V tofore described, and treadle 6 is depressed, roller 40 will be elevated so as to press the mandrel against roller 41. This will cause the roller 4l to move the mandrel l2 outwardly Vto its outer position with the stop 43 resting against abutment 44; By the time the mandrel has been moved outwardly the new rope l0 will have been twisted and may then be manually looped around the mandrel, as

shown in Figure 7, ready for a second operation. This action is continued as longas the llO machine isV in operation, whereby suitable grommets are formed.

Vilhat we claim is 1. A grommet forming machine, comprising a twisting mechanism for twisting strands .into a rope, a reciprocating and partly rotating mandrel positioned to receive the twisted strands, means including a roller for moving the mandrel in one direction,-a pair of twisting rollers coacting with the mandrel for twisting said twisted strands so as to form a round grommet, and a foot operated mechanism for moving said mandrel so that one of the twisting rollers will propel the mandrel to an outer position ready for a second grominet. Y

A grominet forming machine, comprising a twisting mechanism for twisting several strands into a rope, a mandrel adapted to receive said rope, a pair of twisting rollers coacting with said mandrel' for twisting said rope into a round grominet, means for moving said mandrel in one direction after said twisting rollers form said grommet, and a foot opl erated mechanism for raising said mandrel to engage one of said twisting rollers after said grommet has been formed, whereby said lastinentioned twisting roller will move said mandrel to an outer position.

3. A grommet forming machine, including means for twisting a rope into a ring presenting a grommet and means for twisting rope strands into a rope formation, said last-mentioned means including a rotatable knob, power operated means for rotating the knob, a cli'i'cli, a spring for throwing the clutch into operation, and manually actuated means for moving said spring to a non-functioning positioii.

l. A giomniet making machine, including a twisting apparatus and means for turning the twisted rope into a ring grominet, said twisting apparatus being formed witha knob over which the strands of rope are looped preparatory to twisting, a shaft carrying said knob, a pulley loosely mounted on said shaft, a clutch member rigidly secured to said shaft, a spring for pressing said pulley against the clutch member, a second spring stronger than the first spring for preventing the first spring 'troni funrtiening, a power cable coacting with said pulley for rotating the same, and font operated means for moving the secondmentioned spring to a non-functioning position, whereby the first-mentioned spring will cause the pulley to engage the clutch member an d be rotated thereby.

5. ln a gromniet forming machine, a twisting structure, a treadle opei'ated mechanism for connecting power to the twisting structure, a` forming mandreha roller for raising said mandrel, means carrying the roller operated by said treadle, whereby said mandrel will be raised when the power is connected to said twisting structure, means acting on said mandrel when the saine is raised for forcing the same to an outer position, power driven means for forcing said mandrel'inwardly, and a pair of twisting rollers mounted adjacent said mandrel for forming a grominet from a twisted rope as the mandrel is moved to an inner position. i

In a grommet forming machine, a reciprocating mandrel, a pair of power operated twisting rollers, means for forcing `the mandrel against one of the rollers forcausing the mandrel to be moved Vto an outer position, a power operated roller for moving'V the mandrel to an inner position, and means for holding the mandrel in a central position between the twisting rollers as the mandrel is y `moved to an innerposition, whereby a rope looped over the mandrel will be twisted by said twistingrollers and thereby formed into a grommet. i

7. A grommet forming machine, including a mandrel having a bore extending there-v through with means presenting a square opening at one end, said opening being slightly twisted, a square shaft extending through said opening into the mandrel, one end of said shaft being fixed against rotation, said shaft Y being twisted, whereby as said mandrel moves back and forth it will rotate to the extent of the twist in said shaft, power driven means for moving said mandrel in one direction, and power driven twisting rollers positioned to twist a rope into a groininet as the first-mentioned power driven means moves the mandrel in one direction, and a foot operated.

mechanism for causing the mandrel to engageone of the twisting rollers, whereby the inandifel is moved back to its starting point.

8. A groininet forming machine, including a reciprocating mandrel, a pair of twisting s rollers coacting with said mandrel for twisting said rope into a grominet, a lifting roller `for lifting said mandrel so that one of the twisting rollers willmove the mandrel in oney direction, a foot operated mechanism for lifting said lifting roller, and a power driven .roller for moving the mandrel in the opposite direction and a foot operated mechanism for causing said power driven roller to function.

9. A grommet forming machine, including a forming mandrel adapted to receive a rope, a pair of twisting rollers coacting with the mandrel for twisting said rope into agrominet, a power driven roller for moving said mandrel as said twisting rollers function, a

supporting roller for supporting said mandrel as it moves, a spring for normally holding the first-mentioned roller out of contact' with the mandrel, and foot operated means for overcoming the action of said spring. WILLIAM A. YOUNG. ROLAND L. ANKENERS iic 

